Module 2 Physics Final Practice Exam (52 Questions 65 Mints)

 

Module -2 Physics

Final Practice Exam

  

 

1. Which of the following is an example of a Longitudinal Wave?
   1.   Radio Wave
   2.   Sound Wave
   3.   Light Wave
2. In which medium does sound travel the fastest?
   1.   Air
   2.   Steel
   3.   Water
3. Wave length is?
   1.   distance between crests
   2.   distance from trough to crest
   3.   distance between top and bottom
4. Which law states that force equals mass times acceleration?
   1.   Newton’s First Law
   2.   Newton’s Second Law
   3.   Newton’s Third Law
5. The rate of change of velocity is called?
   1.   Speed
   2.   Momentum
   3.   Acceleration
6. The formula for work done is?
   1.   Power × Time
   2.   Mass × Velocity
   3.   Force × Distance
7. The unit of pressure is?
   1.   Joule
   2.   Pascal
   3.   Ampere
8. What is the kinetic energy of an aircraft of mass of 2 metric tonnes and has a velocity of 2m/s?
   1.   2 kJ
   2.   8 kJ
   3.   4 kJ
9. The number of radians in a semi circle are ?
   1.   π
   2.   2π
   3.   exactly 3
10. Which device is used to measure atmospheric pressure?
    1.   Hygrometer
    2.   Manometer
    3.   Barometer
11. When the temperature of a gas increases at constant volume, pressure?
    1.   Increases
    2.   Decreases
    3.   Remains constant
12. The SI unit of heat energy is?
    
    1.   Watt
    2.   Calorie
    3.   Joule
13. Heat transfer through solids mainly occurs by?
    
    1.   Convection
    2.   Conduction
    3.   Radiation
14. The speed of sound is highest in ?
    1.   Liquids
    2.   Solids
    3.   Gases
15. Which color has the shortest wave length?
    1.   Violet
    2.   Green
    3.   Red
16. Which instrument measures relative humidity?
    1.   Thermometer
    2.   Barometer
    3.   Hygrometer
17. Which gas law states that volume is directly proportional to temperature?
    1.   Boyle’s Law
    2.   Charles’s Law
    3.   Avogadro’s Law
18. Regenerators are used in fibre optic systems to reduce?
    
    1.   attenuation
    2.   dispersion
    3.   random emission
19. The density of water is approximately?
    
    1.   0.1 g/cm³
    2.   10 g/cm³
    3.   1 g/cm³
20. Heat transmission by convection is confined to?
    
    1.   solids and liquids
    2.   gases and solids
    3.   liquids and gases
21. The Steam Point of water is?
    
    1.   0 Kelvin
    2.   273 Kelvin
    3.   373 Kelvin
22. A material capable of going direct from solid to gas is a ?
    
    1.   Substrate
    2.   Substance
    3.   Sublimate
23. A compressor increases ?
    1.   potential energy
    2.   moving energy
    3.   kinetic energy
24. A process where temperature remains the same is known as?
    1.   isobaric
    2.   isothermic
    3.   isochoric
25. The instrument used to measure force is called ?
    1.   Spring balance
    2.   Thermometer
    3.   Barometer
26. A body moving in a circular path is said to have ?
    1.   Uniform motion
    2.   Centripetal acceleration
    3.   Linear velocity
27. The product of mass and velocity is ?
    1.   Energy
    2.   Acceleration
    3.   Momentum
28. Which device converts chemical energy into electrical energy?
    1.   Motor
    2.   Battery
    3.   Generator
29. The SI unit of momentum is?
    1.   J/s
    2.   N·m
    3.   kg·m/s
30. Which of the following has maximum inertia?
    1.   A car
    2.   A truck
    3.   A bicycle
31. The force which opposes twisting deformation is?
    1.   torsion
    2.   strain
    3.   shear
32. A millilitre is equal to ?
    1.   one million litres
    2.   one millionth of a litre
    3.   one thousandth of a litre
33. The gyroscopic principle is based upon?
    1.   Newton’s 2nd Law
    2.   Newton’s 1st Law
    3.   Newton’s 3rd Law
34. The SI unit of density is the?
    1.   kilogram per cubic metre (kg/m3)
    2.   Pascal (Pa)
    3.   cubic metre (m3)
35. Convert 220 gallons to litres?
    1.   1000 litres
    2.   48.4 litres
    3.   500 litres
36. How much lift is produced on a wing can be derived from?
    1.   Charles law
    2.   Faraday's law
    3.   Bernoulli's Theorem
37. A good refrigerant has?
    1.   high condensing pressure, high evaporating temperature
    2.   low condensing pressure, low vaporating temperature
    3.   high condensing pressure, low evaporating temperature
38. Boyle's law states that?
    1.   pressure equals temperature divided by volume
    2.   pressure varies directly with volume
    3.   pressure varies inversely with volume
39. 10 BTU is equivalent to?
    1.   63,560 Joules
    2.   10,550 Joules
    3.   570 Joules
40. A wave in which the vibrations are parallel to, or along, the direction of travel is a?
    1.   Upright Wave
    2.   Longitudinal Wave
    3.   Transverse Wave
41. Increasing the Amplitude of a sound wave increases its?
    1.   moment
    2.   loudness
    3.   pitch
42. Quality of sound is dependant on?
    1.   medium it is traveling through
    2.   number and pitch of harmonics
    3.   frequency of the supply
43. The speed of sound in air at 0 °C is approximately?
    1.   181 m/s
    2.   3 * 108 m/s
    3.   331 m/s
44. A Concave mirror is used in?
    1.   headlights
    2.   a periscope
    3.   a rear view mirror
45. The light gathering power of a lens is indicated by its?
    1.   material
    2.   focal ratio
    3.   thickness of the lens
46. Lasers use which source of light?
    1.   Coherent
    2.   Refraction
    3.   Scattered
47. The power of a lens is measured in?
    1.   Lumens per Watt
    2.   Watts
    3.   Diopters
48. The refractive index for air is approximately?
    1.   10
    2.   1
    3.   0
49. The power of a lens is calculated from the?
    1.   focal length squared
    2.   product of the focal length and its distance from the pole
    3.   reciprocal of the focal length
50. The fibre optic receiver is a?
    1.   photodiode
    2.   laser diode
    3.   light emitting diode
51. What will the image produced through a divergent lens be?
    1.   Negative
    2.   Real
    3.   Virtual
52. Temperature is a measure of ?
    1.   the amount of vibration of molecules
    2.   the heat energy of particles
    3.   the amount of friction produced by two mating surfaces

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Module 2 Physics 100 Important Sentences for Revision

 ⚙️ Module 02 – Physics 

1. Basic Concepts

1. Physics is the study of matter, energy, and motion.

2. Matter has mass and occupies space.

3. Mass is the quantity of matter in a body.

4. Weight is the force of gravity acting on mass.

5. Density equals mass divided by volume.

6. Specific gravity is the ratio of substance density to water.

7. Force equals mass multiplied by acceleration.

8. The unit of force is the Newton (N).

9. One Newton equals one kilogram-meter per second squared.

10. Pressure equals force divided by area.

2. Motion and Laws

11. Displacement is the shortest distance between two points.

12. Speed is the rate of change of distance.

13. Velocity is speed in a given direction.

14. Acceleration is the rate of change of velocity.

15. Deceleration is negative acceleration or slowing down.

16. Newton’s first law states a body remains at rest or constant motion unless acted by force.

17. Newton’s second law defines force equals mass times acceleration.

18. Newton’s third law states every action has equal and opposite reaction.

19. Momentum equals mass times velocity.

20. Impulse equals force multiplied by time.

3. Work, Energy, and Power

21. Work is done when a force moves an object.

22. Work equals force multiplied by distance moved.

23. Unit of work is joule (J).

24. Energy is the capacity to do work.

25. Kinetic energy equals half mass times velocity squared.

26. Potential energy equals mass times gravity times height.

27. Mechanical energy equals potential plus kinetic energy.

28. Power equals work done divided by time.

29. Unit of power is watt (W).

30. One horsepower equals 746 watts approximately.

4. Machines and Efficiency

31. Simple machines change magnitude or direction of force.

32. Levers have three classes depending on fulcrum, effort, and load.

33. Mechanical advantage equals load divided by effort.

34. Velocity ratio equals distance moved by effort to load.

35. Efficiency equals mechanical advantage divided by velocity ratio.

36. Pulley systems provide mechanical advantage by rope arrangements.

37. Inclined plane reduces effort needed to lift weight.

38. Gear trains transfer motion and torque between shafts.

39. Screw jack converts rotary motion into linear motion.

40. No machine is 100% efficient due to friction losses.

5. Properties of Matter

41. Elasticity is the ability of material to return to original shape.

42. Hooke’s law states stress is proportional to strain within elastic limit.

43. Stress equals force divided by cross-sectional area.

44. Strain equals change in length divided by original length.

45. Modulus of elasticity equals stress divided by strain.

46. Plastic deformation is permanent change beyond elastic limit.

47. Ductility allows a material to be drawn into wire.

48. Malleability allows a material to be hammered into sheets.

49. Brittleness is property of breaking without deformation.

50. Toughness is resistance to fracture when energy is absorbed.

6. Fluids – Statics

51. Fluid includes both liquids and gases.

52. Pascal’s law states pressure applied to fluid is transmitted equally.

53. Hydrostatic pressure equals density times gravity times height.

54. Archimedes’ principle states a body immersed in fluid experiences buoyant force equal to weight of displaced fluid.

55. Buoyant force acts upward against gravity.

56. Specific weight equals weight per unit volume.

57. Gauge pressure is measured above atmospheric pressure.

58. Absolute pressure equals gauge pressure plus atmospheric pressure.

59. Manometer is used to measure fluid pressure difference.

60. Barometer measures atmospheric pressure using mercury column.

7. Fluids – Dynamics

61. Bernoulli’s principle states increase in fluid speed decreases pressure.

62. Continuity equation states area times velocity remains constant in streamline flow.

63. Laminar flow has smooth parallel layers with no mixing.

64. Turbulent flow contains irregular eddies and mixing motion.

65. Viscosity is internal friction between fluid layers.

66. Reynolds number determines type of fluid flow.

67. Cavitation occurs when vapor bubbles form and collapse in liquid.

68. Flow rate equals volume of fluid per unit time.

69. Venturi tube measures fluid velocity using pressure difference.

70. Pitot tube measures total and static pressures in airflow.

8. Heat and Temperature

71. Heat is energy transferred due to temperature difference.

72. Temperature measures average kinetic energy of particles.

73. Celsius scale has freezing point 0°C and boiling point 100°C.

74. Kelvin scale absolute zero equals −273°C.

75. Heat flows from hot to cold bodies.

76. Specific heat capacity is heat required to raise unit mass by one degree.

77. Latent heat is energy absorbed or released during phase change.

78. Conduction transfers heat through solids by particle vibration.

79. Convection transfers heat through fluids by movement of molecules.

80. Radiation transfers heat without any medium.

9. Gas Laws

81. Boyle’s law: pressure inversely proportional to volume at constant temperature.

82. Charles’s law: volume directly proportional to temperature at constant pressure.

83. Gay-Lussac’s law: pressure directly proportional to temperature at constant volume.

84. Combined gas law relates pressure, volume, and temperature.

85. Ideal gas law: PV = nRT.

86. Absolute zero is temperature where molecular motion stops.

87. Isothermal process occurs at constant temperature.

88. Adiabatic process occurs without heat transfer.

89. Gas expands when heated and contracts when cooled.

90. Standard atmospheric pressure equals 1013.25 hPa or 14.7 psi.

10. Sound and Light

91. Sound requires a medium for transmission.

92. Frequency is number of vibrations per second measured in hertz.

93. Speed of sound increases with temperature.

94. Ultrasound has frequency above 20,000 hertz.

95. Reflection occurs when sound or light bounces from surface.

96. Refraction is bending of light when passing between mediums.

97. Diffraction is spreading of waves around obstacles.

98. Interference occurs when two waves overlap each other.

99. Light travels in straight lines in uniform medium.

100. White light is a mixture of seven visible colors.

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